Apparatus for covering electrical coils



Oct. 11, 1949. G. L.. WEISER ET A1.

APPARATUS FOR COVERING ELECTRICAL COILS Filed OCT.. 29, 1948 9Sheets-Sheet l TToeA/EYS Oct. 11, 1949. G. l.. Wl-:lsx-:R ET ALAPPARATUS FOR COVERING ELECTRICAL COILS 9 Sheets-Sheet 2 Filed Oct. 29,1948 Oct. l1, 1949. G. L WEISER ET A1.

APPARATUS FOR COVERING ELECTRICAL COILS 9 Sheets-Sheet 3 Filed Oct. 29,1948 Oct. 11, 1949.

G. L. WEISER ET AL Filed Oct. 29, 1948 APPARATUS FOR COVERING ELECTRICALCOILS 9 Sheets-Sheet 4 Jg. ff

Oct. 1l, 1949. G. 1 WEISER ET Al. 2,484,509

APPARATUS FOR COVERING ELECTRICAL COILS Filed Oct. 29, 1948 9Sheets-Sheet 5 /A/VE-N 70,25

Oct. 11, 1949. G. l.. wels-:ER ET AL, 2,484,600

APPARATUS FOR COVERING ELECTRICAL COILS Q Sheets-Sheet 6 Filed oct. 29,1948 Oct. 1l, 1949. G. L. wElsER ET AL v APPARATUS FOR COVERINGELECTRICAL COILS 9 Sheets-Sheet 7 Filed Oct. 29, 1948 Oct. 11, 1949. G.l.. wElsr-:R ET A1.

APPARATUS FOR COVERING ELECTRICAL COILS 9 Sheets-Sheet 8 Filed Oct. 29,1948 www) a@ www l/ TTore/veve @du M, i949, G. L. WEHSER ET AL APPARATUSFOR COVERING ELECTRICA` L COILS 9 Sheds-Sheet 9 Filed OG'. 29, 1948INVENTORS' f Z/ M y WZ 'j/4 rroe/EYS Patented Oct. 11, 1949 UNITEDSTATES PATENT OFFICE APPARATUS FOR COVERING ELECTRICAL COILS DelawareApplication October 29, 1948, Serial No. 57,216

8 Claims.

This invention relates to apparatus for covering electrical coils withsheet insulating material such as cloth.

An object of the invention is to provide a machine which wraps a pieceof cloth around an electrical coil and which seals the cloth byimparting heat to a layer of sealing material with which the cloth iscoated. In the disclosed embodiments of this invention there is a dialcarrying a plurality of supports or workholders each adapted to receivea sheet with coated side up and a coil which at one station of the dialis centered with respect to the workholder and is pressed iirmly againstthe cloth so that a middle portion thereof extends across the spacewhich the coil surrounds leaving lportions of the cloth extending beyondopposite side portions of the coil to pro.- vide flaps which are foldedconsecutively upon the coil by devices, which operate while the coil ispassing from the coil positioning station to the .cloth sealing station.At the sealing station, a

heated iron is caused to descend to seal the overlapping iiaps at theends of the coil and to seal the cloth adjacent the inside of the coil.The coil with the cover sealed thereon passes to a station where thecoil is ejected. The unsealed central portion of the cloth is punchedout by a separate punch press so that the coil is in condition formounting on the core of an electromagnet. As disclosed in theaccompanying drawings, the present invention is adapted for use incovering ield coils for generators and motors.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawings, wherein preferred embodiments of the present invention areclearly shown.

In the drawings:

Fig. 1 is a plan view of the machine as adapted for covering generatorfields coils.

Fig. 2 is a fragmentary sectional work on a larger scale than Fig. 1 andis taken on line 2 2 of Fig. 1.

Fig. 2A is a view in the direction of arrow 2A of Fig. 2.

Fig. 3 is drawn to the same scale as Fig. 2 and is a Sectional view online 3 3 of Fig. 1.

Figs. 4 and 5 are fragmentary sectional views Fig. 8 is a fragmentaryplan View of the machine and is drawn to a larger scale than Fig. 1.

Figs. 9 and 10 are fragmentary sectional views taken respectively onlines 9 9 and iB l of Fig. 8.v

Fig. 11 is a fragmentary sectional View on lines H H ofFigs.1and 8.

Fi-g. 12 is a View in the direction of arrow l2 of Fig. 11.

Fig. 13 is a plan View of the ejecting machine which is omitted fromFig. 1 for sake of clearness.

Fig. of Fig. 13.

Fig. 14A is a view of cam 130 in the direction of arrow MA of Fig. 13.

Figs. 15 and 16 are sectional views taken on lines |5 5 and I6 l6respectively of Fig. 13.

Fig. 17 is a sectional view on line Il l'l of Fig. 16.

Fig. 18 is a View showing the cloth and coil upon the workholder.

Fig. 19 shows the one flap folded over the coil.

Fig. 19A is a sectional view showing the apparatus for placing the flapas shown in Fig. 19.

Fig. 20 is a view showing the other fia-p folded 14 is a view in thedirection of arrow I4 on the coil.

Fig. 20A shows a section of the apparatus for folding over the left flapof the coil.

Fig. 21 shows the coil wrapped as in Fig. 20 and, in section, the ironwhich seals the end portions of the wrapping.

Fig. 22 is a fragmentary plan View of a machine similar to that shown inFig. 1, but adapted for folding a cloth cover and sealing the same abouta motor field coil.

Fig. 23 is a fragmentary sectional view on line 23-23 of Fig. 22.

Fig. 23A is a plan view of a workholder as viewed in the direction ofarrow 23A of Fig. 23.

Fi-g. 24 is a, diagram of the cams which effect operation of the clothfolding mechanisms shown in Figs. 22 and 23.

Fig. 25 is a fragment of the ejector mechanism used with the machineshown in Fig. 22 and shows particularly the ejector lever 140' which isused inplace of lever of Fig. 14.

Fig. 26 is a view in the direction of arrow 25 in Fig. 25.

Fig. 27 is a fragmentary sectional view on line 21-21 of Fig. 22.

Fig. 27A is a view in the direction of arrow 21A of Fig. 27.

21 and showing the operations of Wrapping and 5 sealing the clothvon'va. motor eldscoil.

A dial 40, Fig. 1, supports a plurality of work-- Aholders 4|, eachcomprising a plate 42 (Figs. 16 and 17) from which there extendsupwardly 'a resented by the right hand end (Fig. 8) an arm 58.1: of eachof the levers 58L or 58H is caused to engage a cam 80 attached t0 abracket 8| supported by table 10.

At the station marked load cloth (Fig. 1) a piece of cloth A (Fig. "18)is'placed'upon the workholder. The vpiece of cloth is' preferablyprovided with holes which, When the cloth is in rproper position, willreceive the pins the side central boss 43 adapted to itmthinzthe space110 Loffthezclot-h whicheis coated with a piece softened which the coilsurrounds and ribs 44 thus providing recesses 45 which the sideslor.longenportions of the coil C in Fig. 18 WillLt.' .hes'central .boss

43 is surrounded by a pad `4`1=ioflha11d rubberv against which the outersurface of the cloth covwith its covering abovethe level ofthe top of.the

central boss 43. Boss 4'3 contains ,springs A"50 which forceupwardlypinsj 5| for .applying pressurelto the cloth portionwhichextendsbetween the sides and ends of the coil.

With each Workholder 42 there, are associated 25 bars lf54uland 54hattached Atofdial=40 iand=pro viding guides for slides 55fea-chcarryingfacloth flap folding bar 56-anditwo ipins "51 -receiving"between them an end of a lever 58. Eachibra'cket 54a supports t a leaf'springii5'9 which Vurges. fa 'pin iso againstfthe slide 55,"therebyrapplyingfthereto friction sufiicient to retain the slide either in: its'normal posit-ion orfin ari-:operating:position.

Since the cloth folding blades 55 operateat-Ldffferent I times they yare#hereinafter 4designated as 56B and 56L, one being atLthezr-ight andtherother fat the leftzofthefworkholder asviewediniEig. 8. Theirrespective opera-ting levers 58 :are i desiginatedyESRcanbl i58L.

`:with plastic adhesive being uppermost. When the v ,dial is indexed tothe load coil station, the coil :CA istplaced upon thecloth as indicatedin Fig. 18. .'Atrthe idlestationfno work is performed. At the nextstation,.the..coil is seated in the workholder and the central portionof the cloth is caused to f surround A.thezupper portion of the plate 43as showmin Fig. 19A and the side flaps of the cloth are caused to bendupwardly due to engagement with the bosses 44 as indicated at the rightby dot-'dash linesfFR indicating theposition of the `right ffl-ap andindicated'onithe left-,by flap FL, a fragment of which appearsinFig..19A.

lThecapparatus which seats the coiliszshown `in Fig.=2. It 4comprises'bracket :8d: attached .to table 1101 and :includesl a cross platervl`having La vertically extendingrnotclit. -II'he bracketisupports a`horizontal plate`89-whichsupports .acylinder- 90fi-nto the top. of`which ,compressed-,airis .introduced lat the'properti-me tocauseapiston 'rod .9| to move down, the-'bottom ofcylinder '4.99 4beingvented. 'I o-causef rod 9| tom-ove upthe .connections with. .thercylinder.. are` reversed. .Rod .9| carriesa, plate 92 from`.whichextends ascrew ,93 received byy notch .88,.therebypreventingrota-Y tion-.of plate-,92. 4Plate 32,.supports ,a,.platejt4 carrying .a pin95 which supports oppcsitely extending levers 96 and 91 whichtaketheposition .shown in..Fi,g.,.2.by,f gravity. These levers are. re-

Referring to Fig. 10, lever 58R is supportedlifby 14:0SpeCtively-,l'eceivd.bysgIOOl/'BS 93 .and 9.3 T6596@- arcuatebar-BBwhich,..as showminFig. l.Fh-.issup- 45 ,ported .by ,av.bracket,|51attached to Lamatel or table 10.

Referring to Eig. 9, lever 581. is supportedlby the dial '40andgispivoted on a screw 1| threaded .into the dial 40 andV passingthrough a'bushing' 50 'commonto-"thelever 58L and a-lever n`|53L-connected with 'lever 5 8L and '-carryingaroller"l64L adapted to engage thecamming-1-surface 12 -ofa-n -:arcuate bar 13=als'o supportedbyvbracketGT-and tively. provided by the plate'94. The cloth which isplaced.upon,the Workholder is represented" by the dot-dash line ,CxinFig.`2. `Whenthe coil Yisplaced thereon itis supported by the cloth toan extent Suchthat most of the-coilis above'the top surfaceoftheworkholder boss 43. vDuring `thelcwering ofth-eyplate 94, thelevers96 and`91 Vengage the inner surfaces of the ends of the coil and-centerit-with-respect to the block 43 and ythe Yplate P94 vengages thecoiltoforceitf together with'the' cloth around the'blockf4'3 and againstlathe' rubber pad 41. Thenthe application of pressure fluid above Athepiston in cylinderillis re- ;lievedsoithat-fa spring below the-pistoncauses .securedethereto by screws Mipassingfthmughlbars `.pistone-redt)Itorise. The `.dial-is: indexed to carry 5131.andt66 andaniintermediatezspaeer515. :Banditi is also supported by a plate 1Sfxedftoearbracket e186. :Bars 13 izandfware ssupportedealso by a bracket|02a attached to a bracket L02.

The Y- workholders move Vcountercloclmvfise i :with 'i0 the dialasfviewed in.1,ig..8. rRollerl-ll-iRaengages 1the ycam surface|5of.bar-66before rollen-:6411 l,engages .the cam. surface12of1l2arr 13.Therefore the folding blade SSR will move-.toward thee-boss thevworkintothe cover sealing station indicated 'in Fig. 1. Before .theworkarrivesatthisfstation, the right :and lefthandiilaps of .the-,coverwill have been folded upon the coil .consecutively as 'indicated inFigs. ,19, 19A, 20nand 20A.

The apparatusat .thesealing ,station v.comprises a pressure fluidcylinder lsupportedby aplate lLsupported bya ,bracket `|02 supported bythe table 10. Cylinder |00 contains a piston .cone

..43 in .advancewofmovement 'of bladejgL toward c5 nected with a rod |03to which is attachedascrew said boss. When the workholde-rs. arrive...atthe position representedbythe workholder ,which is the left handone in Fig.'.8, both ofzthefolding bars have moved in. fAfter theworkholder'moves from that position,'arm'58x (Fig. 8) isengaged '-70 bya cam T1 attached to a bracket 18 attached to the table 10,' therebycausing-fthe folding'blades to be retracted from the Iboss 43. Inorderto'be `sure that thefolding blades are retractedatf' the ;I04`jhavinga'flanged Vhead |05 which aflanged `disc |06 secures to a bracket |01integral with a `vertically movable slidel 08-and isguided'for suchvertical movement by rails' |09 secured to bracket |02. Screws H0 secureto'y the bracket |01 an iron having a central boss ||2 and end bosses .YI I 3 and I |41v and-heatedby electrical heating elements E located inholes IIS'inthe-iron'lll, A -heat :insulating 'plate |-6= is locatedbetween the time the workholder moves into the position'rep- A-75 ironand bracket |01. Iron |||-andfp1ate4 t5 are provided with aligned holesthrough which extend pins IIT-which are urged downwardly by springs I I8retained by screw plugs I I9, the heads of said pins resting upon theplate II6.

-To the bracket |01 are attached screws |20 pivotally supporting levers|2| having cam surfaces |22 engageable with rollers |23 pivotally'supported by a bracket |24 by a plate I0 I, a spring |25 connecting thelevers I2I urging them agains the rollers |23.

After the work has been indexedinto the sealing station, pressure fluidis admitted to the upper end of cylinder |00 and causes the iron III -todescend. During its descent, the levers I 2| move down and then apart asindicated at I2I` in order to spread the wires W (Fig. 18) unless theyare not already in close proximity to the folds of the cloth. As viewedin Fig. 21, upper edge positions of the folded cloth are engaged by ironboss I I4 and the lower edges by iron boss I I3 in order to seal thesecloth portions together, and the central iron boss I|2 forces the clothportions extending between the sides and ends of the coil against a bead43h provided by the block 43, thereby sealing the cloth at the area 43orepresented by the horizontal and vertical lines in Fig. 2l. Followingthis operation, compressed air is admitted to the lower end of cylinder|00 while its upper end is vented to cause the iron to return to normalposition.

'I'he work is then indexed to the ejecting station indicated in Figs. 1and 13. During this indexing movement, the pins 49 (Fig. 16) engage acam (Figs. 14 and 14A) attached to a bracket |3I supported by table 10,thereby moving the pins to positions 49m and the bars 43 to thepositions 489:, thereby elevating the coil to position Cy. Ejection ofthe coil C toward the left from the position shown in Fig. 14 iseffected by a lever |40 pivotally supported at |4| by a bar |42 attachedto a bracket 43 attached to table 10. The ejecting movement of lever |40is effected by a spring |44 which is prevented from the ejectingoperation by virtue of the connection of lever |40 with a link |45connected with a lever |46 pivoted at |41 upon the bracket |43and'carrying a roller |48 which is normally engaged by a ring |49providing as many notches I 50 as there are workholders. During theinitial part rof the indexing from the ejecting station, the roller |48drops into a notch |50 under the action of spring |44 which causes lever|40 to engage the coil at Cy and remove it from the workholder.Following this operation, a rise |5| in the cam ring |49 engages theroller. |43 to restore the lever |40 to normal position and to stressthe spring |44 preparatory to the next ejecting operation. The ejectingmovement of lever I 40 is limited by engagement of link |45 Vwith a lug|52 of bracket |43.

The indexing of the dial 40 can be effected by any suitable mechanismfor example as disclosed in Holmes Patent #1,994,995 granted March 19,1935. A form of this mechanism is shown in Figs. 3J?. A table 10supports a gear housing |50 which supports a stud |6| which extendsthrough a thrust bearing washer |62 and a bearing bushing |63 which isfitted into the hub |64 of dial 40 secured to the hub by screws I4I.Nuts |65 threaded on the stud retain a disc |66 to which pins |61 securea bearing washer |68 lubricated by an oiler |69. The hub |64 is providedwith six radially extending notches |10 each adapted to receive a roller1| journaled cna pin |12 attached to a disc |13 attached to a shaft |14journaled in a plain bearing SI5 attached to the housing |60 and in aball bearing |16 supported by a cover |11 on the housing. Shaft |14 isconnected by a worm wheel |18 with a worm gear |19 connected with ashaft |00 to which a driving pulley |8I is driven in any suitablemanner. In order to lock the dial when it has located the workholder atthe various stations, the disc |13 is provided with a cam |85 whichengages a roller |86 pivotally supported by a rod |81 integral with ahub |88 attached to a pin |89 guided for vertical movement by a bushing|90 and a bushing |9I. The roller |36 is maintained in engagement withthe cam or with disc |13 by a spring |92 conned in a recess of the pin|89 and bearing against a cap |93 attached to housing |60. Rotation ofrod |89 is prevented by the engagement of a lug |94 extending from hub|88 into a notch |95 provided by a cap |96 attached to housing |60.

Following indexing movement, the cam |85 will have left the roller |86to `permit the spring |92 -to move the pin |89 upwardly into engage mentwith the one of the six hardened metal bushings |91 with which the dialhub |64 is provided. As soon as the dial is thus locked, a cam 200driven by shaft |14 and retained thereon by a nut 20| engages a roller202 of the operating plunger 203 of a valve 204 attached to a bracket205 supported by table 10. When this roller 293 is forced toward theright from the position shown in Fig. 3, pressure fluid is admittedsimultaneously into the upper ends of cylinders and |00 while theirlower ends are vented so that the operations of coil seating and clothsealing will be provided simultaneously. Before indexing starts again,this valve is operated by a spring not shown so that the connectionswith these cylinders are reversed and the pistons in these cylinderswill return to upper position.

Figs. 22-31 show the diiTerences between the previously describedmachine for covering generator eld coils and a machine for coveringmotor field coils. In these figures the parts which correspond andfunction to parts of the first machine are identified by the samereference numbers with the primes affixed. Instead of the cloth foldingplates 56B. and 56L (Figs. 19A and 20A) which are rigidly anchored tothe slides 55 and which are shaped to provide fiexibility, the foldingblades 56B' (Fig. 29A) and 56L (Fig. 30A) are blades of uniformthickness and they are urged against their respective slides 55 bysprings 2|0 located between washers 2|| and surrounding a screw Z|2passing through the washers and spring and connected with the slide 55.Instead of a rubber pad 41 extending entirely around the central boss 43as shown in Figs. 13 and 16, there are two pads 41 located against theopposite smaller ends of the pad 43. The field coil C is made ofrelatively stiff bar lwire having terminals WI and W2. The piece ofcloth A is notched in order to provide access to these terminals afterthe cloth is folded around the form. The sealing iron IIS' (Fig. 3l) isnotched at m` to provide clearance for wire WI which extends over thetop surface of the coil as shown in Fig, 28. In case the coi1 C has itslead wire W2 located at W3 (Fig. 31), iron ||4' has a notch n to receiveit. In order to be sure that lead WI is located properly with respect tothe notches in the cloth A', a mechanism shown in Figs. 27 and 27A isprovided. Bracket |D1 supports a plate 2 5 to which are attached screws2|6 pivotally supporting levers .2H .supporting rollersfzts Murged.against "alcamrbarrzls by wsprlng nllwwhichconnectstthe .leversfllDuring descent :of the :iframe 101'., irllersf2l8 engagertheilowenenlarged end of-bar "2| 9 thereby :causingthezlevers'Z Ilito.zmove to. positions LZIS'Ia'inFig. 27A. '.{In theseipositions, thelleversngageleadWll',inrnrder toposition it corV` :rectlyiif yitzis:not5 alreadyfin thef correctpositionmo locate leajdwire '1Wf3 properlyvvto -ib`e received .fbyvnotchznin :iron 15H4?, a spiate2201,1asecuredfhy screws .122i ztoroniheaterblock ilv l.f2,inas.fafnotch2121vvhich receives'wire rPhe procedurerof placingftheiclothfAandi then"thezc'oil' C :upon the Worlrholders,l seatingithe :coi1, tblding=-theclothiandf'sealing. the' cloth Withheated .ironsas indicated by iFigs28-"3-1,is' the same 'as previously described with respect tto Figs.:1B-:21.

fBecause `the motorieldacoil .is m'ade. of erelatively stiff 4r.barrlWire and ythe ysurface over which the cloth is folded might not beperfectly flat yand might', present anaobstru-ction to v.movement Tofthe "fielding plates, lthe actuation 'of fthese plates for purposeofisafetyiisfeiiec'ted byc'a springr2'3 which asnshownin-Fig.22acon'ne'ots ithe levers .'58R -and 815' which aregpivdtedeat '-23 I4:u'ponthe dial 'MJ'. .Roller -.E'4R' Aattached :to :lever 158B :followsithe `contour or", ai cam1232 iwhi'ohfas: shown :in-Fig. 23, isvconneoted by 'a key 123.3 with -stud |61 `about 'Whichithe dial 40rrota'tes. .-A;1c oiti'on` of the-i con.- ,tour of cam 2'32 is-shown.in?full 11ines`lniFig-24 and the vlout andiin positionsnof rollersR areshown byfdotedash circles marked :by 64R' and idRa'respectively; Lever.'58L' tFig. f2'3) carries .a `rollerilllL which is controlled :by a.cam E235 indicated-by dotdash zlinesfinfFig. 24. The out 231 which isindicated y"in dotted linesinFigZki. The retraction o'f'the foldingplates 'is'effecte'd by "c'am2`32 having a rise -`'Milengagediby roller'64H 561.3 `and located'blow roller 1ML.

The" ej ecting lever l 40 V'whichcorresponds with lever lfil' (Fig. 14)is made ntwo parts25ll and `l'iil pivotally connected at "252'andconnectedfby aspring"253'which urgespart 25| into `the vposi- 'tionshown inFig. 26. .If part y'25| meets with an obstruction .it can turn.clockwise relative to ,part'25li as viewed in Fig. 26, thev spring'2l53yielding to Apermit such movement.

'i As shown inAF-ig. 2, verticallylbelow the cylinder '90 thereislocated between the dial 40 and the ,table .1 il?, .aV block Mia.which transmits to thetable fromthe dial theiforce applied .to theworkhlder .byplate .94 'whenorced downwardly by thepis- ,ton lincylinder 90. .Block ADa-has agroove 'Wb .toffprovide clearance for Ytheejectori-pinsfAS. For a similar purpose, the block 40a is lecatedasshownfin Fig. A.111. The machinefor covering moltor field coils hassimilarblocks, one bein-gindicated-.at a in Fig. Z'Yandfhaving agroovei4-05D providing `clearance lfor i ejector `pins f 4B '.7

While the embodiments'of the `.presentinven- 1tion `as `hereindisclosed, constitute Vpreferred storms, -.it is to .be .understood`thatfotlae'r forms Emight-bel adopted.

' -What.1isclaimed is asrollows: l i ,51. fA machine for -covering taflat 4coil witha. piecefof'clothcoated-.onn one side with fa. heatsoftenable plasticieomprising :a Work holder .having zia central bossadaptedtoireceive the coilwhichsurrounds the boss lwhen ith-e .coilfis-seated upon the work holder andl'h'aving: ribsspaced Ifrom'thelborsiiand vextending respectively Valong opposite louter side/edges ofthevcoil Whenseated, theicloth being placed upon the boss with coated sideup :and the coil being placed Qupon the `'cloth l'and seated upon theWork Iholder 'whereby the central` :portionof the cloth isy caused ytobe located' upon :the top'sun- 'faceiofxthe bossfof the workflrolder andbetween the side surfacesobthe boss andthe inner'surface of the :coiland 'whereby the portions of the cloth which extend fromiitscentralportion -are located between -the bottom of the "coil Vandithe workholder Aand .between outer side edges :of :the mail and the Iadjacentribs of the work holder, the nnc'onned portions .of 'the cloth:providing ,aps extending romlthefribs'of 'itheiwork holder,-:meansfor'folding Athe flapss'uccessively :upon the :coikand upon the cloth'portions voverlying :the boss, .ami means'forfapplying heat to theclothportions extending -ibeyond .the cuter end 'edges I'of the coil 'andto'the clothiportionoverlying'tlfiebossin'order to #effect adherence of.said c'l'oth portions. r2.' A machine :according tov claim 1 furthercharacterized by coil-seating :apparatus which eiects4a'ccuratellocationfof-the coil :relative -to'the boss fand 'which .the-n.ifoices 'the fc'oil land/cloth around the side surfacesfof Athe boss.

3. A machin-e according'to claim z1 'further'.charh acterized by ia:conveyor "and 'a "plurality of the described work 'holders :moved 'by'the conveyor, there 'being fl'apJfolding means associated 'witheachwork holder, means .for 'indexing the conveyor'to ei'ectmovementfof.the'workfholders:suc cessivly tofalloading'stationand a'-.1oi'.n'sea1ing station wheretheneat'applying means is located, a4mechanism whichin respon'se totm'ovement of the conveyor effectsoperation of the inap-folding means associatei with fa `Work iholder'prior to 'its Karrival at the cloth-sealing station, a mechanism 'fordriving :the conveyor indexing means and means controlled 'by saidmechanism for `causing operation f the heat 'applying means While'theconveyor 'is stationary.

f4. A machine 4according-to claim 1 futherichar- `a'cterized by aconveyor and a plurality of the described Work 'holders lmoved by theconveyor, there being nap-folding means associated with eachwork-holder, Ameans Afor indexing Athe 'conf veyorto eiect movement ofthe work'holder successively to a loading lstation to a coil-seatingstation'and to a v'cloth-sealing station where the heat-applying meansis located, apparatus at the `coil-seating s'tationwhich effects.arcuate location of the coil relative .to theboss and which then4forces'the coil and cloth `around the side surfaces df the boss, amechanism which in .response to movement of the conveyor .effectsoperation of the ilap-foldingmeans associated with a work-.holder as .it.moves `.between the coil-.seating and 'the cloth-sealing stations, va.mechanism A:for .driving the ,conveyor :indexing Y.means .and means.controlled by. said.l mechanism .for .causing operation of the.coil-seating.andclothesealing means while Ithe conveyoris stationary.

Y5. A-machine according to. claim-1 furthericharacterized by aconveyordial, a plurality of the described `work holders supportedbythe dial,flapvfolding means 1associated iwith'each work .holder and comprisingtwo flap-folding plates movable across the top of the coil and leversrespectively connected with the plates, cam followers respectivelyconnected with said levers, and fixed cams which control movements ofthe levers for the flap-folding operation by said plates prior toarrival of the associated work holder at the cloth-sealing station wherethe heat applying means is located and movement of the levers to retractthe plates after the Work holder moves past the cloth-sealing station,and means for indexing the conveyor.

6. Amachine according to claim 1 further characterized by a conveyordial, a plurality of the described Work holders supported by the dial,means for lifting the covered coil relative to the work holder andcomprising members engaging the under side of the covered coil and camfollowers connected therewith and a xed cam engaged by the followersafter the work holder passes the cloth-sealing station, and means forindexing the conveyor.

7. A machine according to claim 1 further characterized by a conveyordial, a plurality of the described work holders supported by the dial,means for lifting the covered coil relative to the work holder andcomprising members engaging the under side of the covered coil and camfollowers connected therewith and a fixed cam engaged by the followersafter the work holder passes the cloth-sealing station, means at anejecting station for moving the lifted coil edge- Wise from the Workholder and means for indexing the conveyor.

8. A machine according to claim 1 further characterized by a conveyordial, a plurality of the described work holders supported by the dial,means for lifting the covered coil relative to the work holder andcomprising members engaging the under side of the covered coil and camfollowers connected therewith and a xed cam engaged by the followersafter the work holder passes the cloth-sealing station, means at anejecting station for moving the lifted coil edgewise from the workholder and comprising a lever for engaging the coil to eject it, a camfollower connected with the lever, a cam moving with the dial andengaging the follower to move the lever into position preparatory forcoil-ejection, a spring opposing `said lever movement, said cam having acontour such that, upon location of a work holder at the ejectingstation, the spring is released to cause coil-ejecting movement of saidlever, and means for indexing the conveyor.

GEORGE: L. WEISER. DON E. KEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 720,081 Taylor Feb. l0, 19031,537,697 Roberts May l2, 1925 1,595,838 Turner Aug. 10, 1926 1,777,231Shepard Sept. 30, 1930 1,864,331 Whitesmith June 21, 1932

